Westinghouse WHU09DHA21S Service Manual page 47

Field setting
Outdoor unit DIP switch
DIP Switch Setting of Outdoor Unit (24K/36K)
Turn off all power sources before setting. Without turning off, the switches settings are not
refreshed and might be invalid. Mark of " " indicates the position of DIP switches.
Setting is required
SW2-4
SW2-1
Refrigerant Piping Length Setting Refrigerant Collection
Setting is required
Actual Piping Length L(m)
Max. length allowed
Setting before
shipment
After setting refrigerant piping length dip switch,
cooling/heating performance can be improved.
- 46 -